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{{Abstract|This code example demonstrates how to store files locally using Windows Phone Isolated Storage.}} Official documentation on the topic(s) is available here: [http://msdn.microsoft.com/en-us/library/ff626522(v&#61;vs.92).aspx Local Data Storage for Windows Phone] (MSDN).

{{Abstract|This code example demonstrates how to store files locally using Windows Phone Isolated Storage.}} Official documentation on the topic(s) is available here: [http://msdn.microsoft.com/en-us/library/ff626522(v&#61;vs.92).aspx Local Data Storage for Windows Phone] (MSDN).

Latest revision as of 16:23, 3 August 2013

This code example demonstrates how to store files locally using Windows Phone Isolated Storage. Official documentation on the topic(s) is available here: Local Data Storage for Windows Phone (MSDN).

Note: Symbian developers will recognise that Isolated Storage is conceptually similar to an app's private data cage. The main difference is that Windows Phone apps only have access to their own isolated storage - there is no shared file system. This creates challenges for apps that want to share data or files.

This code examples uses IsolatedStorageFileStream class to write and retrieve text (provided by the user) to a file. In a following section, we also provide information about Isolated Storage Explorer, a tool for exploring the file structure in isolated storage.

We have created an object of IsolatedStorageFile which obtain a virtual storage for the application. Then let’s create a new StreamWriter, to write the file to the specified location. WriteLine() is used to write the content to the file. And Finally we close the StreamWriter. This will just create a new file with the name TestFile.txt in the Isolated Storage.

To retrieve the content of the file from the Isolated Storage. Let’s again create a virtual store for the application. This time we will create a StreamReader to read the content.

Then read the file from the specific location. Read the content of the file with ReadToEnd() and finally display the content of the file to the Textbox. If the file doesn’t exist and user clicks on the retrieve button to display the file content then we display a message. We can also check the file existence with IsolatedStorageFile::FileExists(FilePath).

When we create a file in Isolated Storage the I/O operations are restricted to, so the data are local to the application. It doesn’t have direct access from any other file system or application. So it’s secure from unauthorized access. If you are sharing same data from two applications then those data can’t be local to any of the application, it suggested to store the data in cloud. The storage resources on a phone are limited, so it is recommended to store necessary data.